Feature Requests item #3539970, was opened at 2012-07-03 16:32
Message generated for change (Comment added) made by sdaau
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Category: None
Group: None
>Status: Closed
Priority: 5
Private: No
Submitted By: sdaau (sdaau)
Assigned to: Nobody/Anonymous (nobody)
Summary: A note about podofocolor (example)

Initial Comment:
I just found about podofocolor on 
http://domseichter.blogspot.dk/2011/01/modifying-and-analyzing-colors-in-pdf.html
 - and I got really interested in "Analyzing colors - Find out, which 
colorspaces or colors are used in a PDF". I couldn't find an example of how to 
do that on that page, and I assumed the only way to do is through Lua. 

Unfortunately, while there are some PPA builds for Ubuntu ( see 
http://sdaaubckp.svn.sf.net/viewvc/sdaaubckp/offext-call-scripts/podofo.sh ), 
those do not have Lua built-in, so I rebuilt podofo and utils on Lucid, and 
posted the executables here - since they are statically linked, they may be 
useful to others as well: 

http://sdaaubckp.sourceforge.net/post/libpodofo-utils-lucid/

I have also recorded the steps to building those executables in 
http://sdaaubckp.svn.sf.net/viewvc/sdaaubckp/source-build-scripts/get-podofo-src.sh
 

The above directory also contains a modification of the example.lua script:

http://sdaaubckp.sourceforge.net/post/libpodofo-utils-lucid/example-colorlist.lua

... which can be used to simply print out any color encountered in a PDF, by 
using this command line:

$ ./libpodofo-utils-lucid/podofocolor lua example-colorlist.lua 
/path/to/mytest.pdf /dev/null

<</ID[<XXXX><XXXX>]/Info 2 0 R/Root 1 0 R/Size 16>>
Processing page      1...
   -> Lua is parsing page:      1
Reading object 6 0 R with type: Number
   set_non_stroking_color_gray: 1
   set_non_stroking_color_cmyk: 0.233887        1       1       0.218994
....

Note that it is important to add `/dev/null` as output file - otherwise, both 
the color report _and the pdf in its entirety_ will be dumped to the terminal - 
making the report about colors impossible to read.

I would have appreciated a lot a similar guide/explanation on the blogspot 
webpage (or in a help/readme); and I'd be very happy if some of this here can 
contribute towards more detailed examples in then documentation. 

Many thanks for the great software,  
Cheers!  


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>Comment By: sdaau (sdaau)
Date: 2012-07-03 16:34

Message:
Also, closing this, since it's not really a feature request - just a note
:) Cheers!

----------------------------------------------------------------------

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